Does this 32 bit Ubuntu download mean that I can install only 32 bit Ubuntu on my HP Proliant DL160 G6 which has the Intel Xeon L5520 processor that handles both 64/32bit ? I would like to take advantage of the 64bit processing power.

Do I have to settle for this 32bit Ubuntu or has anyone been successful in running any other 64bit versions for Proliant DL160/Intel Xeon L5520 ?